JP7121574B2 - lamp - Google Patents

Description

The present invention relates to lamps.

Patent Literature 1 discloses a vehicle lamp in which a light source unit is installed at a predetermined position on a heat sink via an attachment. In this vehicle lamp, the light source unit is fixed at a predetermined position on the heat sink by screwing the attachment to the heat sink while enclosing the light source of the light source unit with the attachment.

JP 2012-22789 A

In the vehicle lamp described in Patent Document 1, the wiring body for supplying power to the light source unit is integrated with the attachment, so the cost is higher than when these are formed separately. It is conceivable to separate these for cost reduction, but in this case, it is not easy to ensure electrical connection between the light source unit and the power source.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a lighting fixture which is relatively inexpensive and which allows a more reliable electrical connection between a light source unit and a power source.

In order to solve the above-described problems, a lighting device according to one aspect of the present invention includes a housing, a light source unit mounted on a light source mounting portion of the housing, and a circuit for supplying power to the light source unit fixed to a fixing portion of the housing. a connector having a substrate, a first contact portion that contacts a power supply portion of the circuit board, and a second contact portion that contacts a power reception portion of the light source unit, the connector electrically connecting the power supply portion and the power reception portion; and may be provided. The attachment and the fixing portion may sandwich the first contact portion and the circuit board, and the second contact portion may press the power receiving portion.

Arbitrary combinations of the above constituent elements, and mutual replacement of the constituent elements and expressions of the present invention between methods, devices, systems, etc. are also effective as aspects of the present invention.

According to the present invention, it is possible to electrically connect the light source unit and the power supply side more reliably while maintaining a relatively low cost.

FIGS. 1(a) to 1(c) are external views of a lamp according to an embodiment. FIG. 1C is a cross-sectional view taken along the line AA of FIG. 1(c); It is a cross-sectional view taken along the line BB of FIG. 1(c). 4 is a perspective view of a housing and a plurality of heat radiating fins; FIG. It is a figure which expands and shows a light source unit and its vicinity. 4 is a cross-sectional view taken along line CC of FIG. 3; FIG. It is an exploded perspective view showing an attachment, a connector, and a light source unit. It is a front view which shows a circuit board. It is a front view which shows a lens holding member. 4 is a perspective view showing a lens holding member and a plurality of lenses attached to the lens holding member; FIG. 11(a) and 11(b) are diagrams for explaining a method of attaching the lens to the lens holding member. It is a perspective view which shows the attachment which concerns on a modification, and its periphery.

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below based on preferred embodiments with reference to the drawings. The same or equivalent constituent elements, members, and processes shown in each drawing are denoted by the same reference numerals, and duplication of description will be omitted as appropriate. Moreover, the embodiments are illustrative rather than limiting the invention, and not all features and combinations thereof described in the embodiments are necessarily essential to the invention.

The lighting device according to the embodiment can be widely used, for example, as general lighting such as indoor and outdoor lighting, lighting devices for automobiles, railroads, aircraft, ships, construction machines, etc., and various industrial and commercial lighting devices. is.

1(a) to 1(c) are external views of a lamp 1 according to an embodiment. FIG. 1(a) is a top view of the lamp 1. FIG. FIG. 1(b) is a front view of the lamp 1. FIG. FIG. 1(c) is a right side view of the lamp 1. FIG. 2 and 3 are respectively a cross-sectional view taken along line AA and a cross-sectional view taken along line BB of FIG. 1(c). FIG. 4 is a perspective view of the housing 10 and the plurality of radiating fins 14. As shown in FIG. The lamp 1 includes a housing 10 , a translucent cover 12 , a plurality of radiation fins 14 and a lamp unit 16 .
Hereinafter, the side of the housing 10 on which the translucent cover 12 is provided will be described as the front side of the lamp.

The lamp 1 includes a housing 10 , a translucent cover 12 , a plurality of radiation fins 14 and a lamp unit 16 . The housing 10 is made of metal, for example, and is preferably made of die-cast aluminum, which is lightweight, has good heat dissipation, and is easy to process. The housing 10 has a columnar recess 11 which is open on the front side of the lamp and has a bottom surface facing in the front-rear direction of the lamp.

A translucent cover 12 is attached to the housing 10 so as to cover the opening. A lamp chamber 18, which is a space between the housing 10 and the translucent cover 12, accommodates a lamp unit 16 that emits light forward.

A plurality of radiation fins 14 are erected rearward of the lamp from the outer surface of the housing 10 on the rear side of the lamp. Heat generated in the lamp unit 16 is mainly transmitted to the plurality of heat radiation fins 14 through the housing 10, and is radiated to the outside from there.

FIG. 5 is an enlarged view of the light source unit 30 and its vicinity. 6 is a cross-sectional view taken along the line CC of FIG. 3. FIG. FIG. 7 is an exploded perspective view showing the attachment 36, the connector 34 and the light source unit 30. FIG. FIG. 8 is a front view showing the circuit board 32. FIG.

Reference is made to FIGS. 5-7 in addition to FIGS. The lamp unit 16 includes a plurality of light source units 30 , a circuit board 32 , a plurality of pairs of connectors 34 , a plurality of attachments 36 , a plurality of lenses 38 and a lens holding member 40 .

The housing 10 has a plurality of light sources mounted on a bottom surface 11a of the recess 11 (that is, a surface of the wall surface of the recess 11 that faces the front side of the lamp). It has a part 42 . The light source unit 30 is installed on the light source mounting surface 42 a of the light source mounting portion 42 on the front side of the lamp. Although the shape of the light source mounting portion 42 is not particularly limited, the light source mounting portion 42 is formed in a substantially quadrangular prism shape in the illustrated example. Also, the light source mounting surface 42 a has a substantially rectangular shape with substantially the same size as the main surface of the power supply substrate 52 (described later) of the light source unit 30 . Further, the light source mounting portion 42 has a plurality of positioning projections 42b for positioning the light source unit 30 vertically and horizontally, and protruding forward of the lamp from the light source mounting surface.

The light source unit 30 includes a power supply board 52 and the light source 50 mounted on the main surface of the power supply board 52 . The light source 50 includes a light emitting element 50a and a protective frame 50b surrounding the light emitting element 50a. The light emitting element 50a is, for example, a semiconductor light source such as an LED (light emitting diode), LD (laser diode), organic or inorganic EL (electroluminescence). The power supply substrate 52 has a substantially rectangular shape in this embodiment. Power supply substrate 52 has a conductive pattern including power receiving portion 52a formed on its main surface, and electrically connects light emitting element 50a and power receiving portion 52a.

The housing 10 has, on the bottom surface 11a of the recessed portion 11, a plurality of pairs of first fixing portions 44, each of which protrudes toward the front side of the lamp in the longitudinal direction of the lamp. Each pair of first fixing portions 44 is provided so as to sandwich the corresponding light source mounting portion 42, in the illustrated example, so as to sandwich it from side to side. The circuit board 32 has a plate shape, more specifically a disk shape, and one of its two main surfaces abuts against the surface 44a of the plurality of first fixing portions 44 on the front side of the lamp. It is fixed to the first fixing portion 44 as follows. As a result, the circuit board 32 is positioned not only in the longitudinal direction of the lamp, but also in its surface direction. That is, the plurality of first fixing portions 44 function as positioning portions for positioning the circuit board 32 in the planar direction. Although the shape of the first fixing portion 44 is not particularly limited, in the illustrated example, the first fixing portion 44 is formed in a substantially columnar shape with a central axis extending in the longitudinal direction of the lamp.

A circuit pattern (not shown) for supplying power to the light source unit 30 is formed on the circuit board 32 . An opening 32 a is formed in the circuit board 32 at a location corresponding to the light source mounting portion 42 . Each of the plurality of light source mounting portions 42 protrudes forward of the lamp from the circuit board 32 through the corresponding opening 32a. A screw insertion hole 32 b is formed in the circuit board 32 at a location corresponding to the first fixing portion 44 .

The connector 34 is a metallic member for electrically connecting the power supply portion 32 d of the circuit board 32 and the power receiving portion 52 a of the power supply substrate 52 of the light source unit 30 . The connector 34 has a plate-like first contact portion 70 that contacts the power supply portion 32d of the circuit board 32, and an elongated second contact portion 72 that contacts the power receiving portion 52a of the light source unit 30 and extends from the first contact portion 70. have. The first contact portion 70 and the circuit board 32 are sandwiched between the attachment 36 and the first fixing portion 44 of the housing 10 . As a result, contact, that is, electrical connection, between the first contact portion 70 and thus the connector 34 and the power feeding portion 32d of the circuit board 32 is ensured.

The second contact portion 72 is formed in a convex arch shape toward the front side of the lamp, has one end connected to the first contact portion 70 , and the other end abuts against the power receiving portion 52 a of the power supply board 52 of the light source unit 30 . The second contact portion 72 is elastically deformed in a state in which the first contact portion 70 is fixed to the first fixing portion 44 by tightening together, which will be described later. It is arranged to press 52a. As a result, contact, that is, electrical connection, between the second contact portion 72 and thus the connector 34 and the power receiving portion 52a of the power supply board 52 is ensured. In addition, since the power receiving portion 52a and the power supply substrate 52 are pressed against the light source mounting portion 42 by the second contact portion 72, the power supply substrate 52 is brought into closer contact with the light source mounting portion 42 than otherwise. As a result, the heat radiation performance of the light source unit 30 is enhanced, and a decrease in the luminous efficiency is suppressed.

Attachment 36 includes an insulating member 46 and a light source holder 48 . The insulating member 46 is made of resin, for example, and includes a horizontally long rectangular frame-shaped frame portion 54 having a predetermined thickness, and two screw fastening portions 56 provided at both longitudinal ends of the frame portion 54 . The frame portion 54 surrounds the light source unit 30 and the plurality of positioning projections 42b. A screw insertion hole 56 a is formed in each of the two screw fastening portions 56 .

The light source holder 48 is made of metal, for example, and includes a thin plate-like horizontally long rectangular frame-shaped frame portion 64 , two screw fastening portions 66 provided at both ends of the frame portion 64 in the longitudinal direction, and the frame portion 64 . and pressing portions 68 extending like leaf springs from both wall surfaces on the long side of the opening 64a. The frame portion 64 is configured such that its opening 64 a is substantially the same as the opening 54 a of the frame portion 54 of the insulating member 46 . A screw insertion hole 66 a is formed in each of the two screw fastening portions 66 . As will be described later, when the insulating member 46 and the light source holder 48 are fastened together to the first fixing portion 44, the pressing portion 68 is elastically deformed, and the elastic force causes the power supply substrate 52 and the light source unit 30 to move toward the light source mounting portion. Press against 42 . As a result, the power supply substrate 52 is brought into closer contact with the light source mounting portion 42, so that the heat dissipation performance is improved, and the reduction in the luminous efficiency of the light source 50 can be suppressed.

A screw 62 as a fastening member is inserted from the front side of the lamp through the screw insertion hole 66a formed in the screw fastening portion 66 of the light source holder 48, the screw insertion hole 56a of the screw fastening portion 56 of the insulating member 46, and the first contact of the connector 34. The light source holder 48 and the insulating member 46 are inserted through the screw insertion holes 70 a of the portion 70 and the screw insertion holes 32 b of the circuit board 32 and screwed into the screw holes 44 b formed in the surface 44 a of the first fixing portion 44 . , connector 34 and circuit board 32 are fastened together to first fixing portion 44 or housing 10 .

Circuit board 32 and connector 34 are also configured such that movement (rotational movement and parallel movement) of connector 34 relative to circuit board 32 is restricted. Specifically, in the present embodiment, each of the first contact portions 70 of the connector 342 has a plate-shaped engaging piece 70b projecting toward the rear side of the lamp. An engaging groove 32c is formed in the circuit board 32 at a position corresponding to the engaging piece 70b. The movement of the attachment 36 with respect to the circuit board 32 is restricted by the engagement of the engagement piece 70b of the attachment 36 with the engagement groove 32c of the circuit board 32 . This can prevent the attachment 36 from rotating when tightening together.

FIG. 9 is a front view showing the lens holding member 40. FIG. FIG. 9 is a perspective view showing a lens holding member 40 and a plurality of lenses 38 attached to the lens holding member 40. FIG. FIG. 10 is a perspective view showing a lens holding member and a plurality of lenses attached to the lens holding member.

Reference is made to FIGS. 9 and 10 in addition to FIGS. The housing 10 has, on the bottom surface 11a of the recessed portion 11, a plurality of second fixing portions 45, each of which is a projecting portion projecting in the front-rear direction of the lamp toward the front side of the lamp. The second fixing portion 45 protrudes further to the front side of the lamp than the first fixing portion 44 . The lens holding member 40 is arranged on the front side of the lamp on the circuit board 32 . The lens holding member 40 is, for example, a plate-like member made of metal. The portion 45 is fixed to the second fixing portion 45 and thus to the housing 10 by means of a screw 58 as a fastening member. Although the shape of the second fixing portion 45 is not particularly limited, in the illustrated example, the second fixing portion 45 is formed in a substantially columnar shape with a central axis extending in the longitudinal direction of the lamp.

The lens holding member 40 has a plurality of circular openings 40 a corresponding to each light source unit 30 . Each of the plurality of lenses 38 is attached to the opening 40a of the lens holding member 40, that is, at a position corresponding to the light source unit 30 by bayonet engagement as described later. Each of the plurality of lenses 38 is made of resin and projects light from the corresponding light source unit 30 forward of the lamp.

The lens holding member 40 is configured to block light that enters the lamp 1 from the outside and travels toward the light sources 50 of the plurality of light source units 30 . Specifically, the lens holding member 40 is a non-translucent member and is formed to cover between the lenses 38 so that the light source 50 is not exposed from between the lenses 38 . As a result, deterioration of the light source 50 due to ultraviolet rays can be suppressed.

11A and 11B are diagrams for explaining a method of attaching the lens 38 to the lens holding member 40. FIG. 11(a) is a perspective view of the lens 38, and FIG. 11(b) is a side view of the lens holding member 40 and the lens 38. FIG.

The lens 38 includes a body portion 80 that is a plano-convex lens, a flange portion 81 provided on the incident surface 80a side of the body portion 80, and a spaced apart flange portion 81 on the rear side of the lamp from the flange portion 81. and a plurality of projecting portions 82 projecting from the main body portion 80 . The opening 40a of the lens holding member 40 has recesses 40b corresponding to the plurality of protrusions 82 on its inner wall. The lens 38 is fixed to the lens holding member 40 by inserting the lens 38 into the lens holding member 40 so that the projecting portion 82 of the lens 38 passes through the concave portion 40b, and rotating the lens 38 after the insertion. As shown in the figure, a washer 83, specifically, a wave washer, for example, may be provided between the flange portion 81 and the projecting portion . In this case, the lens 38 can be fixed to the lens holding member 40 more reliably.

Next, a method for manufacturing the lamp 1 described above will be described.
The manufacturing method of the lamp 1 is
a step of fixing a plurality of light source units 30 to the housing 10;
a step of attaching a plurality of lenses 38 to the lens holding member 40;
a step of fixing a lens holding member 40 to which a plurality of lenses 38 are attached to the housing 10;
a step of attaching the translucent cover 12 to the housing 10;

In the step of fixing the light source units 30 , each of the plurality of light source units 30 is inserted into the concave portion 11 through the opening on the front side of the lamp of the housing 10 and installed on the light source mounting portion 42 .

In the step of attaching the plurality of lenses 38, the plurality of lenses 38 is attached to each opening 40a of the lens holding member 40 corresponding to each light source unit 30 by bayonet engagement.

In the step of fixing the lens holding member 40 to the housing 10 , the lens holding member 40 to which the plurality of lenses 38 are attached is inserted into the concave portion 11 through the opening of the housing 10 on the front side of the lamp, and the second fixing portion and the housing 10 are fixed. fixed relative to

As described above, according to the present embodiment, the power feeding portion 32d of the circuit board 32 and the power receiving portion 52a of the light source unit 30 can be electrically connected by the connector 34, which is a metal member. No cables are required for physical connection. In addition, since the first contact portion 70 and the power feeding portion 32d of the circuit board 32 are sandwiched between the attachment 36 and the first fixing portion 44 of the housing 10, the first contact portion 70 and the power feeding portion 32d of the circuit board 32 are electrically connected. connection is ensured. Further, since the second contact portion 72 presses the power receiving portion 52a of the light source unit 30 due to the elastic force of the second contact portion 72, electrical connection between the second contact portion 72 and the power receiving portion 52a of the light source unit 30 is established. be certain. That is, according to the present embodiment, electrical connection between the power supply portion 32d of the circuit board 32 and the power receiving portion 52a of the light source unit 30 is ensured.

Also, according to this embodiment, the plurality of lenses 38 are attached to the lens holding member 40 . As a result, after the plurality of lenses 38 are attached to the lens holding member 40, the lens holding member 40 to which the plurality of lenses 38 are attached can be attached to the housing 10. Therefore, the lamp 1 having the plurality of lenses 38 can be assembled. becomes easier.

The configuration and operation of the lamp according to the embodiment have been described above. It should be understood by those skilled in the art that this embodiment is an example, and that various modifications can be made to the combination of each component, and that such modifications are within the scope of the present invention.

(Modification 1)
FIG. 12 is a perspective view showing an attachment 136 and its surroundings according to a modification. The attachment 136 includes an insulating member 46 and a light source holder 148, which are integrally molded from resin, for example. The light source holder 148 is configured to press the power supply substrate 52 against the light source mounting portion 42 in a state where the attachment 136 is fixed to the first fixing portion 44 . In the illustrated example, the light source holders 148 are protrusions protruding from both wall surfaces on the long side of the frame portion 54 . According to this modification, it is possible to obtain the same effects as those of the embodiment.

Any combination of the embodiments and modifications described above is also useful as an embodiment of the present invention. A new embodiment resulting from the combination has the effects of the combined embodiment and modifications. In addition, those skilled in the art will understand that the function to be achieved by each component described in the claims is realized by each component shown in the embodiments and modifications alone or by their linkage. .

REFERENCE SIGNS LIST 10 housing 30 light source unit 32 circuit board 34 connector 36 attachment 44 first fixing portion 52 power feeding substrate 52a power receiving portion 70 first contact portion 72 second contact portion.

Claims (6)

a housing;
a light source unit mounted on a light source mounting portion of the housing;
a circuit board for supplying power to the light source unit, fixed to a fixed portion of the housing;
a connector that has a first contact portion that contacts the power supply portion of the circuit board and a second contact portion that contacts the power reception portion of the light source unit, and electrically connects the power supply portion and the power reception portion;
with an attachment and
the attachment and the fixing portion sandwich the first contact portion and the circuit board;
The second contact portion presses the power receiving portion,
The lamp, wherein the light source mounting portion and the fixing portion are configured as projecting portions projecting forward of the lamp. 2. The lamp according to claim 1, wherein the second contact portion presses the power receiving portion against the light source mounting portion. 3. The lamp according to claim 1, wherein the attachment has a pressing portion that presses the light source unit against the light source mounting portion. 4. The lamp according to claim 1, wherein the attachment, the first contact portion, the circuit board, and the fixed portion are fastened together by a fastening member. 5. The lamp according to claim 1, wherein said circuit board and said connector are configured such that movement of said connector with respect to said circuit board is restricted. 6. The lamp according to claim 1, wherein the housing includes a positioning portion for positioning the circuit board in its surface direction.

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